CVE-2026-4408

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[{"lang": "en", "value": "CWE-78"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the \"check password script\" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the \"check password script\" is used with %u and the samba-dcerpcd service is started as a system service."}, {"lang": "es", "value": "Se encontr\u00f3 un defecto en Samba. Un atacante remoto puede explotar una mala configuraci\u00f3n en servidores de archivos Samba y controladores de dominio cl\u00e1sicos que utilizan la caracter\u00edstica \u2019check password script\u2019. Si este script est\u00e1 configurado con el car\u00e1cter de sustituci\u00f3n %u, el nombre de usuario controlado por el cliente se pasa sin el escape adecuado de los metacaracteres de shell. Esta vulnerabilidad permite a un atacante lograr la ejecuci\u00f3n remota de comandos en el sistema afectado. Este problema afecta principalmente a configuraciones no est\u00e1ndar donde el \u2019check password script\u2019 se usa con %u y el servicio samba-dcerpcd se inicia como un servicio del sistema."}], "lastModified": "2026-10-26T11:10:00.157", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "932D137F-528B-4526-9A89-CD59FA1AB0FE"}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "214F0165-932F-4289-BDC7-448402F05B3B", "versionEndExcluding": "4.21.0", "versionStartIncluding": "4.1.0"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}